Improvement in gang and trench-plow



www L t i aimant 5mm @aimes i i W .w n ese JOHN G.RoB1Ns0 N, or sPnlNGF in-L'D, ILLINOIS. Letters Patent No'. 88,413, dated March 30, 1869; antedtecl .March 23, 1869.

The Schedule referred to in these Letters Patent and making part o! the same.

Beit known that I, JOHN G. RonINsomof Springfield, Sangamon county, State of Illinois, have invented anew and useful Improvement on Robinsons Combined Gang and Trench-Plow, patented Decembere, A. D. 1860; and I do hereby declare that the following is a full, clear, and accurate description of the construction and operation of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Figure 1 gives a side elevation ofthe plow.

Figure 2 represents the rear elevation, with the plows and beams taken @EL My first improvement isga device for adjusting the depth of the furrows, and consists of the angular lever A, having its fulcrum in the axle-tree M, at the pointi a, and held in its place by the spring B.

The ratchet O is connected with it, along which the angular leverA is worked, and by which it is regulated.

D is the pitman, which connects this angular lever A with the sliding aXle-tree-arm E. Moving this angular lever A backward or forward,

along` the ratchet O, slides the axle-tree up or down,.

by the sliding aXle-tree-arm E, aud thus the depth of the furrow is regulated.

My second improvement 1s a device for adjusting the plows to a perpendicular position, when the axle-tree is on an angle, thus enabling the plows to work on a sidehill, when one end of the axle-tree is lower than the other, and also for the purpose'of trimming the gangplows, so that they will run of equal depths at all times.

This device consists of the vertical couplingr F, piv. oted, at thelower end, upon the axle-tree M, at the pointm, connected with the vertical lever G,by the horizontal bar H, and heldin place by the ratchet I and spring K.

The movement of the lever G, alongV the ratchet I, to the right or left, in connection with the horizontal bar H, and vertical coupling F, produces the desired result herein just before mentioned.

My third improvement consists in so adjusting the drivers seat L, in relation to the centre of the axle-tree M, that the weight of the driver will balance the weight of the tongueand thus take all pressure from the horses neck. This object is obtained, by placing the seat just far enough back of the centre of the axlegtree to raise lthe tongue, when the weight of the driver is is the perforated wrought-iron plate It, held by the bolt Q.

Inthe lower end of 'this wrought-iron pla-tc, is the draught-rod S, to which the double-trees are attached.

Bythis device, the point of draughtmay be raised or lowered, and varied laterally or horizontally. Take the nut, to raise or lower the point of draught. To change it laterally, simpiy loosen the nut and move it the distance required, and then tighten it again.

This clevis is claimed to be different in construction from the clevis patented by Joseph Keech, May 5, 1863, as that one cannot be used upon my plow.

That I claim as my invention, and desire to secure by Letters Patent, is 1. The combination of the angular lever A, ratchet Q, and spring B, wit-h the pitman D and sliding axletree-arm E, in the manner described, and for the purposes, set forth.`

2. The combination of the vertical coupling F, and pivot M, and horizontal bar H, with the vertical lever G, ratchet I, and spring K, in the manner described, and for the purposes set forth.

. JOHN Gr. ROBINSON.

Witnesses:

Guo. O. MAnoY, J. H. CREW. 

